emergency crews blocked roads to better assess the damage, while the rain continued to pour on the city. >> oh, jesus, look at that tornado. >> reporter: another of the more than a dozen tornadoes in the region damaged several homes in southeast mississippi. several people were injured, luckily none seriously. >> we have a lot of damage, people hurt. >> we've had homes that are 90% destroyed. >> reporter: the christmas day storm is being blamed for a young man's death in houston. he was trying to push aside a downed tree, when another tree snapped and fell on top of him, killing him instantly. blizzard conditions blanketed the midwest and beyond. snowplows had to clear roads as far south as lubbock, texas. interstate 40 near the intersection of i-35 and oklahoma was closed for most of christmas morning after a massive car pileup. freezing rain conditions caused 21 vehicles to crash into one another. several people were taken to the hospital. the storms are only expected to increase in strength as they sweep across the nation, delivering another heavy blow to the midwest on wednesday. an